Adjustable cam.



W. 3. STORY.

ADJUSTABLE CAM,

APPLICATION FlLED 06130.1912.

Patented Jan. 2,1917.

h 25 Inventor Q Attorneys.

Urvrrnn snares r ora ion,

'WARD 3. STORY, OF BROOKLYN, NEW YORK, ASSIG NOB T WARD B, STORY COMPANY,

' INC OF NEW YORK, N. Y., A CORPQRA'ZJION OF NEW YQRY.

ADJU STABLE GAD/I.

Specification of Letters Patent.

PatentedJan. a, rare.

Application filed October 30, 1912;. Serial No. 728,578.

To all whom it may concern:

Be it known that I, WARD B. STORY, a citizen of the United States, residing in the borough of Brooklyn, county of Kings, city and State of New York, have invented a certain new and useful Adjustable Cam, of which the following is a specification.

The objects I have in view are to 'secure the proper feed of the ink to the roller,-irrespective of the consistency of the ink; to regulate the feed of ink, and to adjust such feeding while the pressis in operation and without stopping it; to utilize the rolling effect of the supply roller to the utmost; to.

simplify the construction and make it sure and certain in operation; to compensate for the changeddiameter of the supply roller, due to shrinkage thereof; to provide for gradually reducing the supply of ink to the press as the latter approaches the end of a run; toprovide for arresting the feed of ink when the press is backed up for making ready; and to provide a positive feed for the ink, and avoid the use of ratchets and other intermittently operating mechanism. These and further objects will more fully appear from the following specification and accompanying drawings, considered together or separately.

In the drawings: Figure 1 is a sectional view on the line 11 of Fig. 2; Fig.2 is a side elevation of an apparatus embodying ink reservoir 2, which has a flexible. bottom 3, and adjustable means 4 therefor. Any

. suitable form of flexible bottom and adjustable means may be employed, .bu't T'have illustrated in Fig. 4, the preferable means and devices which are shown and described 'ink is introduced in the fountain.

in my co pending application for patent, filed October 1, 1912, SerialNo. 723,318.

' The fountain roller 5 .is mounted on a shaft 6, in suitable hearings in the frame 1. carries a crank 7, on one extremity. A worm gear 8, is loosely mounted on the shaft 6. It is secured to the crank 'Zby means .of a screw bolt 9; By backing the screw bolt out of the worm gear, and attaching a crank (not shown) to one end of the shaft, so that it will engage with the projecting part. of the bolt, the fountain roller may be rotated by hand, when the suppl i of he worm gear 8 is engaged by a worm 10, which is mounted on a worm shaft 11. This shaft has a bevel gear 12at its lower end. This worm shaft 11 is mounted in bearings 13, in

the frame 1. A cam,shaft 14, is provided with a bevel gear 15, which engages with the bevel gear 12. This cam shaft is' provided with a drive gear 16. 17 is mounted in suitable bearings in the frame 1, and is provided with a drive gear 18, and clutch 19. This clutch may be of any suitable type,that illustrated in Fig. 1

A drive shaft being a jaw clutch of usual design. This form of clutch, connecting the drive gear 18 to the drive shaft 17 permits the shaft 17 to rotate the drive gear 18, when it turns in one direction, but the dogs of the clutch slide by one another when the shaft is turned the clutch are held in engagement by means of av spring 19. p v is to prevent rotation of the cam shaft, and,

through the gearing described, thefountain roller, when the press is backed up for making ready. Without this clutch, the

fountain roller would be rotated in the opposite direction, to the ordinary feed, and

ink would be deposited upon the floor.

A supply roller 20 is carried upon a shaft The purpose of this clutch,

in the opposite direction. The elements of it is understood that a -similar arm is to be placed on the other side of the frame, to hold the other end of the shaft 21. ink roller 25, is carried upon an ink carnage 26, in

suitable position to be engaged by the supof the arm 23. The upper end of the spring 30 also engages with the support 31. The

expansion of the spring exerts stress upon the arm 23, and tends to normally elevate the supplyroller. v

For the purpose of depressing the supply roller to cause it to engage with the ink roller, a pitman 32, is provided. This pitman is secured to the arm 23 bymeans of a bolt 33. The bolt is mounted in a slot in the arm, and is best shown in Figs. 2 and 4, so that the position of the bolt may be adjusted to accommodate changes in diameter ofthe supply-roller due to shrinkage of the latter, to always insure proper engagement of the latter with'the ink roller. The pitman 32 has a fork 34 at its lower end. It also is provided with rollers, 35 and 36, which engage with a fixed cam 37 and movable cam 38, respectively. The fixed cam, which is secured fixedly upon the cam shaft, is of such a shape that the engagement of the roller 35 With it will elevate the pitman and depress the supplvroller and cause it to engage with the ink roller through the minimum proportion of time, during'which the apparatus is designed-to operate. The movable-cam 38 is adapted to be rotated, in relation to the fixed cam, so that the period of time in ,which the supply roller will be engaged with the ink roller will be increased up to the maximum proportion. The rollers 35 and.36 engage these two cams. It will be understood that both rollers being carried, upon the pitman, the latter will be elevated when either of the rollers 35 or 36 is in engagement with the high part of either of the cams 37 or 38. It will also be understood" that if the movable cam is rotated in relation to the fixed cam, the ex tent of the high part of the two cams,to gether. will be increased, and hence the supply roller will be depressed through a longer interval of time in relation to the rotation of the other rollers. a

The means for changing the angular position of the movable cam is as followszQThe cam is connected to the first differential 39. ,This differential is mounted upon the cam shaft 14. The first difierential consists of a bevel gear 40, directly. connected to the movable cam; a center member 41, rotatably mounted upon the cam shaft; and arbevel gear- 42, also rotatably mounted uponthe cam shaft. The center v member of the differential is in the usual form, and carries one or more bevel pinions w iich engage with the bevel gears 40 and 42. The second differential 43, consists of a bevel gear 44, attached to and rotating the bevel gear 42. It also comprises a center member 45, and a bevel gear 46. This center member is'of the same character as the'preceding center member. The bevel gear 46 is secured to the shaft 43 so that it will be rotated-by the latter. The center member 45, is prevented from rotating by means of the support 47, (see Fig. 3). For the purpose of changing the angular position of the center member 41, it is provided with a lever 48. .This lever has a nut 49, (see Fig. 2) s This nut engages with a rod 50, having screw threads 51,

where it passes through the nut. The rod is carried upon a support 52. It is rotated by a hand Wheel 53. It is apparent that by rotating the hand wheel 53, the free end of the lever 48 will be raised or lowered ,.thus changing the angular position ofthe 'center member 41. The movable camis. rotated on the shaft 14, when the center member is moved, through the agency of the bevel gears 46 and center member 45 and bevel gear 44. It is apparent that if the-bevel gears 44 and 46' are the same size, the center member will be prevented from rotatingby means of the support 47, and the bevel gear 44 will turn at the same rate of speed as the.

shaft 14, but in the opposite direction. I The bevel gear 44 rotates the bevel gear 42, Which rotates the bevel pinions which are in the center member 41. These bevel pinions will rotate the bevel gear 40 in the direction Jopposite from which the bevel-gear 42 rotates. In other words,it will rotate it in. the same direction as the shaft 14. Assuming that the lever 48 is not moved, it is apparent that the bevel gear 40 and movable cam rotate at the same rate of speed as the shaft 14, and in the same direction. It is, therefore, apparent thatif the free end of the lever 48 be raised-orlowered to change the angular position of the centermember, the

position of the first differential will be It will be apparent, from the foregoing fountain roller at varying speeds, as has been heretofore customary. By utilizing the worm gear described, the fountain, roller is rotated at constant speed. The consistency of the ink will determine the thickness or thinness of the film. The amount of ink which is supplied to -the ink roller will be varied by the relative period of time in which the supply roller is in contact with the fountain roller, or out of contact therewith. By utilizing the adjustable bottom of the receptacle, the thickness of the film of .ink may be varied in accordance with the gonsistency of the ink, irrespective of the eed.

. In operating the device, it is apparent that when the press is getting near to the end of a run, the operator, by adjusting the position of the hand wheel 58, can vary the relative period of time during which the supply roller is in contact with'the fountain roller, so that when the run is finished, there will be no surplus ink upon the rollers of the ink carriage.

The great advantageof the device is that the thickness of the ink film on the fountain roller is determined by the consistency of .the ink, and the supply is regulated entirely by the interval of time in which the supply 7 roller dwells on the fountain roller. All the time that the supply roller is not in contact with the fountain rolleris utilized in rolling the ink on the ink roller.

In accordance with the provisions of 'the' patent statutes, I have described the principle of my invention, together with the apparatus which I now consider to represent the best embodiment thereof; but I desire to have it understood that the apparatus shown is merely illustrative and that the inven tion can be carried out in other ways.

Having now described my invention, what i I claim as new, and desire to secure byLetters Patent, is

I 1. An adjustable cam comprising a fixed,

cam member, and a movable cam member,

an immovable element, and a screwcarried by the element for adjusting the, members to change the relative angles of the members.

2. An adjustable cam comprising a fixed cam member and a movable cam member, an immovable element, a device associated with the movable member, a nut carried by the device, and a screw supported on the element and engaging the nut whereby the relative angle of the members may be changed.

3. An adjustable cam comprising a fixed cam member and a movable cam member, an ob 'ect moved in one direction by the cam, independent means for moving the object in the opposite direction, means for adjusting the initial position of the .object relatively an object moved inone direction by the cam,

independent means for moving the object in the opposite direction, means for adjusting the initial position of the object relativelyto the cam, an immovable element, a device associated with the movable member, a nut carriedby the device, and ascrew supported on the element and engaging the nut whereby the relative angle of the members may be changed.

5. An adjustable cam comprising a fixed cam member and a movable'cam member, an object movedinone direction by the cam, a spring for moving the object iirthe opposite direction, means for. adjusting the initial position of the object relatively to the cam, an immovable element, and means stadirection, -means for adjusting the initial position of the object relatively to the cam, an immovable element, a difierential gear a connected to the movable member, said differential'gear including a center-member, and means stationary on the element for moving the center member. v v 7. An adjustable cam comprisinga fixed cam member and a movable cam member,

an object moved in one direction by the cam,

a spring for moving the object in the opposite direction, means for adjusting the initial position of the object relatively to the cam, an immovable element. a differential gear, said differential gear including a center member, means for moving the center memher, a second gear having an immovable centermember whereby the two cam members will rotate in the same direction.

8.-An' adjustable cam comprising a fixed cam member and a movable cam member, an object moved in one direction by the cam, a spring formoving the object in the opposite direction, means for adjusting the. initial position ofthe object relatively to the cam, an immovable element, and a screw carried by the element for adjusting the members to change the relative angles of the members.

' 9. 'An adjustable cam comprising a fixed cam member and a movable cam member, an object moved in one directionby the cam, a spring for moving the object in the opposite direction, means for adjusting the ini- This s iecification signed and witnessed this 26th day of October, 1912.

WARD B, STORY.

Witnesses:

JAs. F. COLEMAN, JOHN L Loreen. 

